Asymmetric Warps in Disk Galaxies: Dependence on Dark Matter Halo

Saha, K and Jog, CJ (2006) Asymmetric Warps in Disk Galaxies: Dependence on Dark Matter Halo. In: Proceedings of the International Astronomical Union, 2 . 113-113 .

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Abstract

Recent observations have shown that most of the warps in the disk galaxies are asymmetric. However there exists no generic mechanism to generate these asymmetries in warps. We have shown that a rich variety of possible asymmetries in the z-distribution of the spiral galaxies can naturally arise due to a dynamical wave interference between the first two bending modes i.e. bowl-shaped mode(m=0) and S-shaped warping mode(m = 1) in the galactic disk embedded in a dark matter halo. We show that the asymmetric warps are more pronounced when the dark matter content within the optical disk is lower as in early-type galaxies.

Item Type:	Journal Article
Publication:	Proceedings of the International Astronomical Union
Publisher:	Cambridge University Press
Additional Information:	Copyright of this article belongs to Cambridge University Press.
Keywords:	galaxies;kinematics and dynamics-galaxies;spiral-galaxies; structure
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	08 Aug 2011 05:40
Last Modified:	02 Nov 2011 05:07
URI:	http://eprints.iisc.ac.in/id/eprint/39815

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